NPI registry status
Active
2026 NPPES data Gerontology Nurse Practitioner NPI 1528507886 NP
Verify on CMS → Tammy Johnston, NP
Gerontology Nurse Practitioner in Minneapolis, Minnesota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 9,706 in Gerontology Nurse Practitioner, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
149
Medicare Part D claims · 38 beneficiaries · Gerontology Nurse Practitioner avg: 1K
Generic prescribing
83%
generic claims · 17% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
83.5/100
▲ 0 pts above national avg 83.1 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Tammy Johnston, NP reported a CMS MIPS final score of 83.5/100 - above the 83.1 national average - and filed 149 Medicare Part D claims in 2023.
- 83.5/100
- MIPS score · +0 vs avg
- 149
- Part D claims, 2023
- 83%
- generic prescribing
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Tammy Johnston, NP's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
84 42nd percentile higher than 42% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Tammy Johnston, NP sits
This provider among gerontology nurse practitioner peers
Across the 1,301 gerontology nurse practitioner providers who report both Medicare Part D prescribing and a MIPS quality score, Tammy Johnston, NP writes more Part D claims than 28% of them and scores higher on MIPS quality than 44% - placing this provider in the lower-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one gerontology nurse practitioner peer from a representative sample of 60; the gold marker is Tammy Johnston, NP. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Tammy Johnston, NP?
Near national averagePrimary specialty
Gerontology Nurse Practitioner
Medicare Part D claims
149 88% vs specialty avg
MIPS final score
83.5/100 0.4 pts vs avg
Specialty distribution in Minnesota
How Gerontology Nurse Practitioner compares to other specialties among Minnesota providers
Medicare quality performance, MIPS
Tammy Johnston, NP's 2023 MIPS final score plotted against the Gerontology Nurse Practitioner national average
- MIPS Final Score
- 83.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Gerontology Nurse Practitioner) - 83.5/100 vs national avg 83.1
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Tammy Johnston, NP appears in the CMS NPPES registry as a Gerontology Nurse Practitioner provider holding NP credentials at 800 E 28TH ST STE H2100, Minneapolis, MN, 55407, with a listed phone of (612) 863-3900. NPI 1528507886 was issued on 02/20/2017.
Medicare Part D records for calendar year 2023 show 149 prescription claims written by this provider, covering 38 Medicare beneficiaries and totaling roughly $13K in drug spend, split 17% brand-name and 83% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 83.5/100 for the 2023 performance year (Quality 81.8, Cost 63.3), compared with the national average of 83.1.
Gerontology Nurse Practitioner is a mid-sized specialty nationwide, with 9,706 enrolled providers across 54 states and an average of 1,283 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1528507886 |
|---|---|
| Specialty | Gerontology Nurse Practitioner |
| Credentials | NP |
| Gender | Female |
| NPI Issued | 02/20/2017 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
83.5331
Final Score
Avg: 83.1
81.7967
Quality
63.3136
Cost
100
Promoting Interoperability
Reporting: Group practice
Brand vs generic prescribing mix · Typical
Tammy Johnston, NP - brand share 17.0%
Gerontology Nurse Practitioner average
17% brand-name claims vs 83% generic, on 149 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
149
Total Claims
$13K
Total Drug Cost
38
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 173
- Total Day Supply
- 4,287
- Brand vs Generic
- 17% brand / 83% generic
- Brand Drug Cost
- $9K
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 85.2 years
- Avg HCC Risk Score
- 2.34
- Gender Split
- 71% female / 29% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Eliquis Apixaban | 13 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gerontology Nurse Practitioner Overview
How Tammy Johnston, NP fits within the Gerontology Nurse Practitioner landscape nationally.
9,706
Gerontology Nurse Practitioner Providers in US
54
States with Gerontology Nurse Practitioner
1,283
Avg Claims per Provider
Tammy Johnston, NP's 149 claims are below the specialty average of 1,283.
Nearby Gerontology Nurse Practitioner Providers in Minnesota
Other clinicians with the same primary specialty enrolled in Minnesota, drawn from the same CMS NPPES roster as Johnston.
Dr. Rebecca Ahlstrom
APRN, CNP
Rogers, MN
Dr. Mickey Amos
CNP
Minneapolis, MN
Dr. Erika Andersen
AGNP
Apple Valley, MN
Dr. Linda Anderson
RN, CNP
Duluth, MN
Luke Anderson
Minneapolis, MN
Compare Gerontology Nurse Practitioner nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Minnesota medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Gerontology Nurse Practitioner peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Tammy Johnston, NP's specialty? ▼
Tammy Johnston, NP specializes in Gerontology Nurse Practitioner and practices in Minneapolis, Minnesota. Credentials: NP.
How much does Tammy Johnston, NP prescribe under Medicare Part D? ▼
In 2023, Tammy Johnston, NP wrote 149 Medicare Part D claims totaling $13K in drug costs for 38 beneficiaries.
What is Tammy Johnston, NP's Medicare quality score? ▼
Tammy Johnston, NP has a CMS MIPS Final Score of 83.5/100 (Quality: 81.8, Cost: 63.3). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Tammy Johnston, NP located? ▼
Tammy Johnston, NP is located at 800 E 28TH ST STE H2100, Minneapolis, MN, 55407. Phone: (612) 863-3900.
What is Tammy Johnston, NP's NPI number? ▼
Tammy Johnston, NP's National Provider Identifier (NPI) is 1528507886, issued on 02/20/2017.
Does Tammy Johnston, NP prescribe more brand-name or generic drugs? ▼
Tammy Johnston, NP's prescribing is 17% brand-name and 83% generic drugs by claim count, with $9K in brand drug costs.
How many Gerontology Nurse Practitioner providers are there in the US? ▼
There are 9,706 Gerontology Nurse Practitioner providers across 54 states in the US. The average Gerontology Nurse Practitioner provider writes 1,283 Medicare Part D claims per year.
What drugs does Tammy Johnston, NP prescribe most often? ▼
Based on 2023 Medicare Part D data, Tammy Johnston, NP's most frequently prescribed drugs include Eliquis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Tammy Johnston, NP accept Medicare? ▼
Tammy Johnston, NP appears in CMS Medicare data with 149 Part D claims and 38 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Tammy Johnston, NP's credentials? ▼
Tammy Johnston, NP's NPI is 1528507886 with credentials NP. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.